Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a815ff6647c76d…

MALICIOUS

PDF

65.6 KB Created: 2020-12-03 13:02:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98ded4a50a58399196f3f81e1a3e4c58 SHA-1: 11c7f37a1531c6f70eefce6806994f75922a2eac SHA-256: 51a815ff6647c76d733920d7e6c18e60b1be60ae62b03143eaf5e03e3cb6e1d5
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into paying fees for a non-existent prize or delivery. The embedded URL points to a suspicious domain, likely part of the scam infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffking.ru/123?utm_term=six+guns+apk+obb
    • https://nulakumoxuguv.weebly.com/uploads/1/3/1/8/131871970/pefosusawevovizeziv.pdf
    • https://fifimijo.weebly.com/uploads/1/3/4/7/134748793/dafiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aecb8a20-b58a-425c-9eee-92ea527eb368/13295701602.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf60b9eaf37e3b64938acf/1606377658232/plant_cell_coloring_sheet_answer_key.pdf.pdf
    • https://s3.amazonaws.com/juvetaso/corporate_bylaws_sample.pdf
    • https://uploads.strikinglycdn.com/files/729f937f-fd10-4914-91cc-585975601bba/14596517979.pdf
    • https://static1.squarespace.com/static/5fc2f58b2cf09257bd796827/t/5fc44812cb3e0f5771d80ec5/1606699026844/freedom_high_school_bell_schedule.pdf
    • https://uploads.strikinglycdn.com/files/657d3cda-7615-4d86-a79a-16dff2106e28/tagomi_man_in_the_high_castle.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c443.bin
638f04d1812a9df3a2e0361e894a8963e222c9880a9cbff8e8c5151d60494920		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC443 5232 bytes
font_01_sfnt_off0000d62c.bin
efb123baea48545fb046314fd66bbf13861089950629a02d20ac2b21f3070356		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD62C 10532 bytes

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